2.7 T2 Power Loss

[gellis4x4]

Hi all, a little advice is sought. I have a 03 Nissan 2.7Td Commercial that I have been very happy with. On Monday whilst on the Motorway I had a massive power loss. Engine would rev out at 2000-2500 and no power. I thought contaminated fuel, filter blocked etc (been serviced a week before). RAC recovered to Local Nissan dealer. Plugged in diagnostics, said airflow unit was faulty, exchanged, test drove, no problems.

I collected, got 6 miles down the road, same problem, and called garage, all gone home. 9am Tuesday drove back to garage, problem occurred just before I arrived at garage. Expressed my disappointment, service manager took vehicle for 16 mile journey, never missed a beat. I got into car, 1.5 miles it died again, loss of power. Turned key off & on, restarted, drove back to garage. Took service manager with me and this time she did the loss of power routine, and a quick off / on of the ignition sorted the problem for the return to Garage. No fault shown on the dash during all this.

To cover ourselves we have changed the fuel filter, air filter, airflow meter.

The garage plugged in the diagnostic and this time it came back with Turbo pressure problem. However a restart clears the problem for a while.

Your advice, comments and observations appreciated

Many thanks

Graham

 

[zippy656]

MAF. try cleaning it.

can get them off eBay a lot less than Nissan..


I had similar towing...

had to stop on a hill. needed to drop to low 4wd to make it to teh top at 2mph..


didnt help caravaners bad name that day..


Zippy

 

[extreme-4x4]

small hose on turbo could be split,

try the download for maf something to do with taking the maf out and test drive

my tdi when on emergancy home/ safety mode would only do 1.500 rpm max. so based on my experience (limited) id say your not in safety mode if your getting 2500 rpm

so this would point to the turbo mine comes in hard at 2500 rpm likely to be that little 15mm hose

what top speed are you getting

 

[jims-terrano]

Hi Zippy, the Air Flow Meter is the MAF I have to say though that was my first thought. Does the Engine Management light come on? if so check the downloads section as there is a workshop for reading the fault codes.

The only other thing that springs to my mind is air getting into the fuel system, possibly a rubber leak off pipe splitting. You may have some diesel smells from that too.

Jim T

 

[extreme-4x4]

good point , air in the fuel either new fuel filter loose from service damaged fuel line usually can smell fuel but not always

on some cars you can tell cos the fuel works its way back to the tank but i dont think that shows on these cos the fuel filter is so big and high up you always have fuel to start them

damaged fuel line would normaly come with grey- black smoke (but not always)

 

[zippy656]

Hi Zippy, the Air Flow Meter is the MAF I have to say though that was my first thought. Does the Engine Management light come on? if so check the downloads section as there is a workshop for reading the fault codes.

The only other thing that springs to my mind is air getting into the fuel system, possibly a rubber leak off pipe splitting. You may have some diesel smells from that too.

Jim T

yep i know, i didnt read it properly... oops but the spit pipe would do it
too i think as would a lot of other bits..

when my maf went i could rev to 4500 easy.. just could pull the skin of custard!!

not good when towing the caravan up hill though

 

[Jocky]

My 1st thought was MAF, but I've reservations about the low RPM, MAF should not stop revs, just gutless.

Next time it does it DO NOT STOP ENGINE, unplug MAF and see if the problem is the same, could be intermitant fault on new MAF. If no change stop engine and do the restart thing and it should be gutless with MAF unplugged, reconnect MAF see what happens

As said check all hoses on fuel system for leaks and around the turbo.

DO you get a MIL light??



:smile:

 

[zippy656]

just mind your fingers.!!!!

 

[Rick1956]

Had similar problem with mine after a massive power loss, aquired a new MAF, this got me full power again. However the power loss fault returned intermitently, with no apparent reason, most of the time the old truck would fly and then no power again, turned out the MAF was a cheap and nasty version and not one of the normal type fitted. Some times that old saying of " you get what you pay for " still rings true :roll: :roll: :roll: